CanHandleLaunchRequest.md

@CanHandleLaunchRequest

The @CanHandleLaunchRequest method decorator is used on the canHandle method of a RequestHandler class.

Usage

@CanHandleLaunchRequest(): (target: any, key: string, descriptor: PropertyDescriptor) => PropertyDescriptor

This decorator accepts the following parameters:

• @CanHandleLaunchRequest()

Examples

@CanHandleLaunchRequest()

No parameters passed to the decorator.

import { HandlerInput, RequestHandler } from 'ask-sdk';
import { Response } from 'ask-sdk-model';
import { CanHandleLaunchRequest } from 'ask-community-decorators';

export class LaunchRequestHandler implements RequestHandler {

    @CanHandleLaunchRequest()
    canHandle(handlerInput: HandlerInput): boolean {
        
        // original code
        return true;
    }   
}

is equivalent to

import { HandlerInput, RequestHandler } from 'ask-sdk';
import { Response } from 'ask-sdk-model';

export class LaunchRequestHandler implements RequestHandler {

    canHandle(handlerInput: HandlerInput): boolean {

        // decorator code
        const canHandle = handlerInput.requestEnvelope.request.type === 'LaunchRequest';

        if (canHandle === false) {
            return false;
        }

        // original code
        return true;
    }   
}